Immigrant parents provide a powerful "health buffer" for their preschoolers, but that protection has an expiration date. Families who have lived in the U.S. for over a decade tend to adopt the sedentary, screen-heavy habits of their U.S.-born neighbors.

Caregivers born outside the U.S. are significantly more likely to prioritize outdoor play and limit screen time for their preschoolers, but this benefit erodes the longer a family lives in the United States. If you have been in the country for 10 years or more, your child is statistically likely to follow the U.S. trend of high screen use and low physical activity.

This research highlights that "Americanization" isn't just about language or food; it is about how children spend their minutes. For parents, this serves as a warning that the local environment is "obesogenic"—it naturally pushes families toward digital consumption and away from the outdoors. If you are an immigrant parent, your "default" cultural settings for play are likely healthier for a child's development than the local U.S. norms. If you are a U.S.-born parent, this study provides a benchmark showing that lower screen time is achievable and common in other cultural contexts within the same borders.

Researchers have long observed an "immigrant health paradox," where newcomers are often healthier than long-term residents despite having fewer resources. They wanted to see if this trend starts in the preschool years, a critical window for habit formation. By analyzing the 2022 National Survey of Children's Health, the team looked for the "tipping point" where the health advantages of foreign-born parenting start to fade. They were specifically looking at how the "U.S. environment"—which includes everything from car-centric infrastructure to the ubiquity of digital entertainment—slowly reshapes family life over time.

The data shows a clear "dose-response" relationship between time spent in the U.S. and a shift in lifestyle habits for kids aged 3 to 5.

The study suggests that "acculturation" is a double-edged sword. While moving to the U.S. might offer more economic opportunity, it often comes at the cost of the "active lifestyle" infrastructure found in many other countries. In many cultures of origin, walking and outdoor socializing are the default modes of life; in the U.S., they are often "scheduled activities." The fact that the 10-year mark is the equalizer suggests that it takes about a decade for the U.S. environment to fully break down traditional parenting habits and replace them with the domestic "norm" of indoor, digital-first leisure.

The study relies on the 2022 National Survey of Children's Health, which is a massive and reputable dataset, but it is observational. It cannot prove that living in the U.S. causes the increase in screen time, only that the two are linked. Additionally, "outdoor play" was defined broadly by parents, and definitions of what counts as "play" can vary significantly across cultures. The study also did not distinguish between types of screen time (educational vs. entertainment), which might vary by nativity and influence the impact on development.

Your place of birth is a powerful predictor of your child’s health habits, but the American environment acts as a powerful eraser of those traditions over time. Whether you are a newcomer or have been here for decades, the goal is to resist the "cultural gravity" that pulls kids toward screens and keep them moving outside.

Tchoua PP, Peterson SM, Smith FT et al. (2026). Association of caregiver nativity and U.S. residency on preschoolers' time playing outdoors and screen time: Findings from the 2022 National Survey of Children's Health. medRxiv : the preprint server for health sciences. doi:10.64898/2026.05.07.26352664 — https://pubmed.ncbi.nlm.nih.gov/42145628/